mtg oversized cards Commander 2013 you may put it onto the battlefield The Fourth Sphere (Planechase) -

The Ur-Dragon Price range: $4.00 through $8.00 The Ur-Dragon Size 8.8cm x 6.3cm, Fit perfectly into KMC perfect fit sleeve

You don't choose a target for Hydra Trainer's first ability at the time it triggers

(1/24/2025) A creature's mana value is determined solely by the mana symbols printed in its upper right corner (unless that creature is the back face of a double-faced card, is a melded permanent, or is copying something else

Because you have to activate the ability outside of the normal casting sequence due to its mechanical complexity, it is functionally one of the worst lands ever printed

For those that want to include it in multicolored decks, run it alongside a card like Urborg, Tomb of Yawgmoth, to see it play at full strength